EP3927931A1 - Système de traversée électrique et ses procédés d'utilisation - Google Patents

Système de traversée électrique et ses procédés d'utilisation

Info

Publication number
EP3927931A1
EP3927931A1 EP20715514.4A EP20715514A EP3927931A1 EP 3927931 A1 EP3927931 A1 EP 3927931A1 EP 20715514 A EP20715514 A EP 20715514A EP 3927931 A1 EP3927931 A1 EP 3927931A1
Authority
EP
European Patent Office
Prior art keywords
assembly
conductor
electrical
electrical feedthrough
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20715514.4A
Other languages
German (de)
English (en)
Other versions
EP3927931B1 (fr
Inventor
Erik VAN MOOK
Matthew Keller
Christopher Kennedy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FMC Technologies Inc
Original Assignee
FMC Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FMC Technologies Inc filed Critical FMC Technologies Inc
Publication of EP3927931A1 publication Critical patent/EP3927931A1/fr
Application granted granted Critical
Publication of EP3927931B1 publication Critical patent/EP3927931B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
    • E21B33/0385—Connectors used on well heads, e.g. for connecting blow-out preventer and riser electrical connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5202—Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/523—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7036—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/005—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert

Definitions

  • Embodiments disclosed herein relate generally to subsea oil and gas operations equipment. More specifically, embodiments disclosed herein relate to systems and methods of use for an electrical feedthrough to provide power to subsea equipment.
  • subsea operations may be performed in waters offshore at great depths.
  • any number of electrical systems may be deployed on the seabed to perform subsea operations.
  • Many of these electrical systems need high-reliability power grids and power control units located on the seabed, offshore rig, and/or buoyant devices to power various devices.
  • Power systems play a major role in providing the required and reliable power to the various electrical systems.
  • there are many challenges for deploying power components under the seabed such as the requirements of power system components operating in subsea environment, use of electronics for efficient transmission of power from the offshore platform or from the shore to the subsea electrical loads, variable speed drive systems, and research areas related to power electronics for subsea electrical systems.
  • power is provided from external sources to the subsea devices via cable conductors to submerged process control equipment, pumps and compressors, transformers, motors, and other electrically operated equipment.
  • a cable termination and connector which may be an electrical penetrator, designed to penetrate and provide power through a subsea tree.
  • electrical power for the subsea operations is generated in two different ways, one being offshore power generation and the other is onshore generating station.
  • gas turbine driven generators may be installed on the platforms.
  • subsea devices such as electric submergible pumps (“ESP”) and compressors are located very far from the onshore generating stations, it requires a long tieback power transmission system.
  • ESP electric submergible pumps
  • compressors are located very far from the onshore generating stations, it requires a long tieback power transmission system.
  • using high power high voltage AC transmission systems may minimize the power losses, and the reactive power due to the large capacitance of the power umbilical.
  • the long distance high power and high voltage transmission/distribution require strong power cables with good insulation capability.
  • the power umbilical can be fully electric or multiplexed wherein both electrical and hydraulic lines are combined to feed power from the power generator to the subsea device.
  • an electrical feedthrough assembly may have a lower assembly having a first end and a second end.
  • the lower assembly may include an outer body with a lower housing and an upper housing disposed within a bore of the outer body and a first conductor extending from the lower housing to the upper housing, wherein at least one portion of the first conductor is enclosed in a first insulator.
  • the lower housing extends axial outward from the outer body to form the first end and the upper housing extends axial outward from the outer body to form the second end.
  • the electrical feedthrough assembly may have an upper assembly having body extending from a first end to a second end.
  • the second body may include a pin end at the first end inserted into an opening of the second end of the lower assembly; a second conductor disposed within the body and at least one portion of the second conductor is enclosed in a second insulator; a piston disposed within the body configured to move the second conductor, and a dielectric fluid provided within at least one chamber of the piston. Furthermore, the second conductor is conductively connected to the first conductor and a length of the first conductor is in contact with an electrical contact of the upper assembly.
  • the embodiments disclosed herein relate to a method of connecting a first end of a lower assembly of an electrical feedthrough assembly to a subsea device; inserting a pin end at a first end of an upper assembly of the electrical feedthrough assembly into a second end of the lower assembly; passing a first conductor of the lower assembly through the pin end and into the upper assembly; actuating a piston in the upper assembly to move a second conductor of the upper assembly such that a first end of the second conductor moves from a first electrical contact in the upper assembly to a second electrical contact in the upper assembly and second end of the second conductor moves to a third electrical contact; contacting the first conductor of the lower assembly to the first electrical contact; connecting a second end of a upper assembly to a subsea tree; contacting the third conductor of a power source to a third electrical contact in the upper assembly; and powering subsea devices conductively through the electrical feedthrough assembly.
  • Figure 1 is a perspective view of a wellhead in accordance with one or more embodiments of the prior art.
  • Figure 2 is a cross-sectional view of a lower assembly of an electrical feedthrough assembly in accordance with one or more embodiments of the present disclosure.
  • Figure 3 is a cross-sectional view of an upper assembly of an electrical feedthrough assembly in accordance with one or more embodiments of the present disclosure.
  • Figure 4 is a cross-sectional view of an electrical feedthrough assembly in accordance with one or more embodiments of the present disclosure.
  • Coupled or “coupled to” or “connected” or
  • connection to “attached” or“attached to” may indicate establishing either a direct or indirect connection, and is not limited to either unless expressly referenced as such.
  • the terms“upper” and“lower” are merely used to indicate relative position and may change depending on orientation, and are not limited to either unless expressly referenced as such.
  • like or identical reference numerals are used in the figures to identify common or the same elements. The figures are not necessarily to scale and certain features and certain views of the figures may be shown exaggerated in scale for purposes of clarification.
  • any terms designating tree or tubing head (i.e., any wellheads or tubing hanger) at a rig type (i.e., any land rig or offshore rig) should not be deemed to limit the scope of the disclosure.
  • fluids may refer to slurries, liquids, gases, and/or mixtures thereof. It is to be further understood that the various embodiments described herein may be used in various stages of a well, such as rig site preparation, drilling, completion, abandonment etc., and in other environments, such as work-over rigs, fracking installation, well-testing installation, oil and gas production installation, without departing from the scope of the present disclosure.
  • a tree or tubing head plays a valuable and useful role in the life of a well.
  • electrical feedthrough assembly configuration and arrangement of components for providing electrical power to subsea devices according to one or more embodiments described herein may provide a cost effective alternative to conventional systems.
  • the embodiments are described merely as examples of useful applications, which are not limited to any specific details of the embodiments herein.
  • an electrical feedthrough assembly such as electrical conductor that may be used to provide power to subsea devices, for example.
  • the electrical feedthrough assembly may also be interchangeably referred to as an electrical penetrator assembly in the present disclosure.
  • the electrical feedthrough assembly is an apparatus that may include a lower assembly and an upper assembly coupled together.
  • a pin end of the upper assembly is inserted into an opening of the lower assembly to conductively connect a conductor of the lower assembly to a conductor of the upper assembly.
  • a pin end of the upper assembly is inserted into an opening of the lower assembly to conductively connect a conductor of the lower assembly to a conductor of the upper assembly.
  • Figure 1 illustrates wellhead 1 in accordance with one or more embodiments of the prior art.
  • Wellheads are well known in the art, and thus, a brief overview is given to help provide a general view of the embodiments disclosed herein.
  • the wellhead 1 includes a tubing head 2 disposed on the wellhead 1. Additionally, the tubing head 1 contains a tubing hanger assembly 3 for engaging down hole equipment (not shown). Furthermore, the wellhead and the tubing head 2 may include a port 4 to perform various wellbore and annulus operations.
  • Figure 1 illustrates one example of a wellhead; however, the wellhead 1 may take any form (i.e., number of components, shape, or size) known in the art without departing from the scope of the present disclosure.
  • Figure 2 illustrates a cross-sectional view of the lower assembly 101 of an electrical feedthrough assembly (See Figure 4) in accordance with the present disclosure.
  • the lower assembly 101 may include an outer body 114 with a bore 115, such as a metal sub.
  • a lower housing 116 and an upper housing 117 may be disposed in the bore 115.
  • the lower housing 116 and the upper housing 117 may be made from metal. It is further envisioned that a lower end 118 of the lower housing 116 and an upper end 119 of the upper housing 117 may extend outside the bore 115 to form a first end 105 and a second end 107 of the lower assembly 101, respectively.
  • a first full-metal-jacket (“FMJ”) connector 104 may be inserted into an opening 132 at a first end 105 of the lower housing 116.
  • the first FMJ connector 104 may be a dual redundant metal-to-metal seal with multiple fittings such as the FMJ connector by Halliburton.
  • an opening 131 of the upper housing 117 may be exposed to a surrounding environment.
  • an upper end 120 of the lower housing 116 may be coupled to a lower end 121 of the upper housing 117.
  • the lower end 121 of the upper housing 117 may be threaded onto an outer surface 122 to connect to threads 123 in the bore 115.
  • an electrical penetrator 126 may be disposed at the upper end 120 of the lower housing 116.
  • the electrical penetrator 126 may include optics or ceramic to enable electrical transmission.
  • a metal-to-metal seal 127 may be inserted between the electrical penetrator 126 and the lower housing 116.
  • the conductor 128 may extend a length of the lower assembly 101 to extend past the first end 105 into the tubing hanger assembly and connect to subsea devices.
  • the conductor 128 may be a wire or a shaft made of a material consisting of copper, gold, silver, aluminum, nickel-cobalt or any combinations thereof. It is further envisioned that the conductor 128 may have the conductor connector 129 attached thereof in the upper housing 117. One skilled in the art will appreciate how the conductor 128 may have an insulator 130, such as a polyether ether ketone (“PEEK”) molding, surrounding a length of the conductor 128 to environmentally isolate the conductor 128.
  • PEEK polyether ether ketone
  • glass bodies (133a, 133b) may be disposed around portions of the conductor 128 and a glass-to- metal seals 160 may be inserted between the glass bodies (133a, 133b) and metal housings (e.g., the electrical penetrator 126). While it is noted that Figure 2 shows two glass bodies (133a, 133b), one of skill in the art would understand that this is merely a non-limiting example and any number of glass bodies may be used without departing from the present scope of the disclosure.
  • Figure 3 illustrates a cross-sectional view of the upper assembly 102 of the electrical feedthrough assembly (See Figure 4) in accordance with the present disclosure.
  • the upper assembly 101 may be a body 139 extending from a first end 110 to a second end 112. It is further envisioned that the body 139 may have a middle portion 140 which has an outer diameter larger than an outer diameter of the first end 110 and the second end 112.
  • a second full-metal-jacket (“FMJ”) connector 111 may be inserted into an opening 150 of the upper assembly 102 at the second end 112 to be connected to a subsea tree connector of a subsea tree.
  • FMJ full-metal-jacket
  • the second FMJ connector 111 may be the same as the first FMJ connector 104. Additionally, within the middle portion 140, a piston 144 may be provided, such as pressure compensation piston. In a non-limiting example, the piston 144 may actuate (i.e., compress) as a conductor 135 moves in an upward direction (see block arrow 145) to have a conductor connector 138 of the conductor 135 of the upper assembly 102 engage a second electrical contact 136b. Additionally, an end conductor connector 141 of the conductor 135 of the upper assembly 102 moves in the upward direction (see the block arrow 145) to contact a third electrical contact 136c.
  • the piston 144 may actuate (i.e., compress) as a conductor 135 moves in an upward direction (see block arrow 145) to have a conductor connector 138 of the conductor 135 of the upper assembly 102 engage a second electrical contact 136b. Additionally, an end conductor connector 141 of the conductor 135 of the upper assembly 102 moves in the
  • the piston 144 actuates when a pin end 134 of the upper assembly 102 is inserted into the opening (see Figure 2) of the lower assembly (see Figure 2) such that the conductor (see Figure 2) of the lower assembly extends past the pin end 134.
  • the pin end 134 may be fitted with elastomer wiper seals 149 to ensure the pin end 134 is sealed within the lower assembly.
  • chambers (146, 147) around the piston 144 may be filled and sealed with a dielectric fluid (or gas) to fluidly isolate the conductor 135 and keep the piston 144 lubricated.
  • the dielectric fluid may selected from the group of transformer oils, perfluoroalkanes, and purified waters. It is further envisioned that a side 148 of the middle portion 140 may be exposed to a surrounding environment.
  • an electrical penetrator 152 may be disposed at an area where the middle portion 140 meets the second end 112.
  • the electrical penetrator 152 may include optics or ceramic to enable electrical transmission. Additionally, a metal-to-metal seal
  • the conductor 135 may extend a length of the upper assembly 102 to extend from the first end 110 into the middle portion 140. Further, the upper conductor 143 extends from the area where the middle portion 140 meets the second end 112 to be attached to a power source from a subsea tree.
  • the conductors (135, 143) may be a wire or a shaft made of a material consisting of copper, gold, silver, aluminum, nickel-cobalt or any combinations thereof. It is further envisioned that the conductor 135 may have the conductor connector 138 attached thereof in the first end 110.
  • the conductors (135, 143) may have an insulator 151, such as a polyether ether ketone (“PEEK”) molding, surrounding a length of the conductors (135, 143) to environmentally isolate the conductor (135, 143).
  • PEEK polyether ether ketone
  • a glass-to- metal seals 155 may be inserted between the glass bodies 154 and metal housings (e.g., the electrical penetrator 152).
  • the electrical feedthrough assembly 100 may include the lower assembly 101 and the upper assembly 102, as described in Figures 2 and 3.
  • the lower assembly 101 may be connected to the tubing hanger assembly by landing a first shoulder 103 of the lower assembly 101 on a shoulder of the tubing hanger assembly.
  • the first FMJ connector 104 may be used to couple the first end 105 of the lower assembly 101 to a tubing hanger connector of the tubing hanger assembly.
  • the second FMJ connector 111 may be used to couple the second end 112 of the upper assembly 102 to a subsea tree connector of a subsea tree.
  • the upper assembly 102 may be coupled to the lower assembly 101 such that a second shoulder 106 at the second end 107 of the lower assembly 101 abuts and is flush against a first shoulder 109 at the first end 110 of the upper assembly 102.
  • a pin end 134 e.g., a shuttle pin
  • the upper assembly 102 may include a plurality of electrical contacts (136a, 136b, 136c, 136d).
  • Figure 4 shows four electrical contacts (136a, 136b, 136c, 136d), one of skill in the art would understand that this is merely a non limiting example and any number of electrical contacts may be used without departing from the present scope of the disclosure.
  • a piston see Figure 3
  • the upper assembly 102 is actuated such that a first electrical contact 136a of the upper assembly 102 may contact a conductor connector 129 of the conductor 128 of the lower assembly 101.
  • the conductor connector 129 of the conductor 128 of the lower assembly 101 extends past the pin end 134 to be inserted into the upper assembly 102.
  • a wire 137 connects the first electrical contact 136a to a second electrical contact 136b in contact with a conductor connector 138 of the conductor 135 of the upper assembly 102.
  • a continuous conductor 113 is formed within the electrical feedthrough assembly 100. With the continuous conductor 113 being formed, power may be provided through the electrical feedthrough assembly 100.
  • the piston (see figure 4) of the upper assembly 102 is actuated such an end conductor connector 141 of the conductor 135 of the upper assembly 102 contacts a third electrical contact 136c with a second wire 142 connecting from the third electrical contact 136c to a fourth electrical contact 136d. Further, the fourth electrical contact 136d contacts an upper conductor 143 extending out from the upper assembly 102 to be attached to a power source.
  • Electrical feedthrough assemblies are apparatuses that include multiple conductors within a lower assembly and upper assembly, which may include a piston with one dialectical fluid in upper assembly to compensate for motion and thermal expansion, and may include no environment compressible bladders installed within the multiple components that are arranged in a certain layout and contained within the electrical feedthrough assembly.
  • the elimination of environment compressible bladders and the need for multiple fluids in the electrical feedthrough assembly significantly improves the operational safety, reliability, and longevity during drilling, completions, production, and work-over operations, while providing continuous power through the electrical feedthrough assembly.
  • a pin end of the upper assembly is inserted into an opening of the lower assembly to conductively connect a conductor of the lower assembly to a conductor of the upper assembly.
  • one or more glass-to-metal seals and metal-to-metal seals, along with PEEK molding, may be used to environmentally isolate the conductors of the electrical feedthrough assembly.
  • other instruments and devices including without limitation, sensors and various valves may be incorporated within the electrical feedthrough assembly.
  • Conventional electrical feedthrough devices for subsea power distribution in the oil and gas industry are typically isolated conductors with various fluid profiles within each bladder of said conventional electrical feedthrough devices. Conventional methods may include an extensive layout and arrangement to ensure the conductors may be properly isolated and effective within said conventional electrical feedthrough devices.
  • conventional electrical feedthrough devices are manufactured to include multiple slots and chambers used to hold the bladders with various fluid profiles and an apparatus to the various fluid profiles do not mix.
  • Such conventional electrical feedthrough devices may be more expensive to manufacture because of the extra machining needed to account for the various fluid profiles.
  • the use of bladders with various fluid profiles may increase the potential for gas and cycling build-up within the conventional electrical feedthrough devices as well as of leak paths to the environment.
  • conventional methods merely use elastomer seals which may cause the conventional electrical feedthrough devices to consistently fail an ohms test. This additional need for bladders with various fluid profiles and elastomer seals, increases the number of leak paths, adds to manufacturing and installation costs, and decreases the operational safety.
  • the electrical feedthrough assembly is often used for assisting in providing power and electricity to well devices.
  • Examples of the electrical feedthrough assembly may be used for drilling, completion applications, including natural flow, gas lift, and artificial lift systems in onshore and offshore wells and to continue producing for conventional and unconventional wells.
  • Examples of electrical feedthrough assembly, according to embodiments herein, may include a two-piece assembly for nominal wellhead sizes range from 7 1/16 inches to 11 inches and above, and with any power range required for various well operations. Achieving a successful conductor connection of the electrical feedthrough assembly in the tubing hanger is an important part of a well operation.
  • an electrical feedthrough assembly may be safer, faster, and lower in cost as compared with conventional methods due, in part, to multiple electrical contacts within the electrical feedthrough assembly conductively connecting conductors from a lower and upper assembly of the electrical feedthrough assembly.
  • the electrical feedthrough assembly may comprise a piston (with one dielectric fluid) and pin end within the upper assembly to aid in conductively connecting the conductor from the lower assembly to the conductor of the upper assembly to form a continuous conductor that require no need for bladders with various fluid profiles, and thus, relaxing control tolerances and improving manufacture (i.e. reduced cost and reduced time to manufacture).
  • Overall the electrical feedthrough assembly may minimize product engineering, risk associated with electrical feedthrough assembly, reduction of assembly time, hardware cost reduction, and weight and envelope reduction. Additionally, one skilled in the art will appreciate how the electrical feedthrough assembly, according to embodiments herein, may be attached to any subsea devices without the departing from the scope of the present disclosure.
  • methods of the present disclosure may include use of the electrical feedthrough assembly 100 and other structures, such as in Figures 2-4 for providing power to subsea devices. Because the method may apply to any of the embodiments, reference numbers are not referenced to avoid confusion of the numbering between the different embodiments.
  • a lower assembly of an electrical feedthrough assembly is coupled to a tubing hanger.
  • a first FMJ connector inserted into an opening of a lower housing of the lower assembly is connected to a tubing hanger connector such that a conductor of the lower assembly extends into the tubing hanger.
  • an electrical penetrator may be used to aid in continuing the conductor into the lower assembly.
  • an upper assembly of the electrical feedthrough assembly is landed on the lower assembly.
  • a pin end at a first end of the upper assembly is inserted into an opening of an upper housing of the lower assembly opposite the end of the FMJ connector.
  • a shoulder of the upper assembly abuts and is flush onto a shoulder of lower assembly.
  • a conductor connector of the conductor of the lower assembly extend into the upper assembly though the pin end to contact a first electrical contact.
  • a second FMJ connector inserted into an opening at the second end of lower assembly is connected to a subsea tree.
  • a piston is provided with the upper assembly is actuated to move a first connector conductor of the conductor of the upper assembly from the first electrical contact to a second electrical contact.
  • the first electrical contact and the second electrical contact are connected via a wire.
  • the piston moves a second connector conductor of the conductor of the upper assembly to a third electrical contact, which is connected to a fourth electrical contact via wire.
  • a dialectic fluid is provided within chambers of the piston to isolated and insulates the conductors as well as lubricating the piston.
  • an upper conductor connected to a power/electrical source extends into the upper assembly to contact the fourth electrical contact such that power/electricity may be provided to the electrical feedthrough assembly.
  • lengths of the conductors in the lower and upper assemblies may be insulated with PEEK molding.
  • glass bodies may be provided on the conductors in the lower and upper assemblies. It is further envisioned that glass-to-metal seals may be provided to seal the glass bodies from metal parts. In addition, metal-to-metal seal may be provided to seal any meat parts within the electrical feedthrough assembly.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

L'invention concerne un ensemble de traversée électrique qui présente un ensemble inférieur ayant une première extrémité et une seconde extrémité. L'ensemble inférieur comprend un corps extérieur comportant un boîtier inférieur et un boîtier supérieur disposé à l'intérieur d'un trou de forage du corps extérieur et un premier conducteur s'étendant du boîtier inférieur au boîtier supérieur. D'autre part, le boîtier inférieur s'étend axialement vers l'extérieur à partir du corps extérieur afin de former la première extrémité et le boîtier supérieur s'étend axialement vers l'extérieur à partir du corps extérieur afin de former la seconde extrémité. En outre, l'ensemble de traversée électrique comporte un ensemble supérieur ayant un corps s'étendant d'une première extrémité à une seconde extrémité. Le second corps comprend une extrémité de broche au niveau de la première extrémité insérée dans une ouverture de la seconde extrémité de l'ensemble inférieur. Un second conducteur est disposé à l'intérieur du corps. Un piston est disposé à l'intérieur du corps et est conçu pour déplacer le second conducteur.
EP20715514.4A 2019-02-20 2020-02-19 Système de traversée électrique et ses procédés d'utilisation Active EP3927931B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201962808111P 2019-02-20 2019-02-20
PCT/US2020/018840 WO2020172286A1 (fr) 2019-02-20 2020-02-19 Système de traversée électrique et ses procédés d'utilisation

Publications (2)

Publication Number Publication Date
EP3927931A1 true EP3927931A1 (fr) 2021-12-29
EP3927931B1 EP3927931B1 (fr) 2023-02-08

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EP20715514.4A Active EP3927931B1 (fr) 2019-02-20 2020-02-19 Système de traversée électrique et ses procédés d'utilisation

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US (1) US11795775B2 (fr)
EP (1) EP3927931B1 (fr)
BR (1) BR112021016504A2 (fr)
WO (1) WO2020172286A1 (fr)

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Publication number Publication date
EP3927931B1 (fr) 2023-02-08
US11795775B2 (en) 2023-10-24
WO2020172286A1 (fr) 2020-08-27
US20220154544A1 (en) 2022-05-19
BR112021016504A2 (pt) 2021-10-26

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